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Debalancing machine is consisted from two parts:1 measurement instrument and debalancing part. ALL parts (rotors for DC motors) are measured (100% inspection). If balance is more than prespecified target (eg. > 40 gmm) then parts go through balancing operation that lowers the debalance below target (measured again). Parts, that go to the next operation, than comes from two distributions (supposed nonnormal):1. good parts from initial measurement and 2. balanced parts. How to measure the Ppk (I understand that Cpk can not be computed). Is it necessary to compute Ppk, since it seems all parts are good but parts from the first distribution can be near the target (but below!)
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Vojko Krizman
SLOVENIA
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Vojko Krizman
SLOVENIA